CN115401351A - Welding process of aluminum alloy section - Google Patents
Welding process of aluminum alloy section Download PDFInfo
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- CN115401351A CN115401351A CN202210981789.8A CN202210981789A CN115401351A CN 115401351 A CN115401351 A CN 115401351A CN 202210981789 A CN202210981789 A CN 202210981789A CN 115401351 A CN115401351 A CN 115401351A
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- welding
- aluminum alloy
- alloy section
- area
- polishing
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- 238000003466 welding Methods 0.000 title claims abstract description 235
- 229910000838 Al alloy Inorganic materials 0.000 title claims abstract description 168
- 238000000034 method Methods 0.000 title claims abstract description 43
- 238000005498 polishing Methods 0.000 claims abstract description 71
- 239000003973 paint Substances 0.000 claims abstract description 53
- 239000012535 impurity Substances 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 13
- 239000012670 alkaline solution Substances 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims description 43
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 claims description 9
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 9
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 239000000243 solution Substances 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 8
- 238000001816 cooling Methods 0.000 claims description 7
- 229910052751 metal Inorganic materials 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 7
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 5
- 244000137852 Petrea volubilis Species 0.000 claims description 5
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 238000007664 blowing Methods 0.000 claims description 5
- 230000001680 brushing effect Effects 0.000 claims description 5
- 238000005260 corrosion Methods 0.000 claims description 5
- 230000007797 corrosion Effects 0.000 claims description 5
- 229910017604 nitric acid Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005406 washing Methods 0.000 claims description 5
- 239000002932 luster Substances 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 6
- 238000007788 roughening Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000007517 polishing process Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K37/00—Auxiliary devices or processes, not specially adapted to a procedure covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K31/00—Processes relevant to this subclass, specially adapted for particular articles or purposes, but not covered by only one of the preceding main groups
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
- B24B55/02—Equipment for cooling the grinding surfaces, e.g. devices for feeding coolant
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B9/00—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor
- B24B9/02—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground
- B24B9/04—Machines or devices designed for grinding edges or bevels on work or for removing burrs; Accessories therefor characterised by a special design with respect to properties of materials specific to articles to be ground of metal, e.g. skate blades
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23F—NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL; MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLIC MATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASS C23 AND AT LEAST ONE PROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25
- C23F1/00—Etching metallic material by chemical means
- C23F1/10—Etching compositions
- C23F1/14—Aqueous compositions
- C23F1/32—Alkaline compositions
- C23F1/36—Alkaline compositions for etching aluminium or alloys thereof
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention relates to the technical field of aluminum alloy welding, in particular to a welding process of an aluminum alloy section, which comprises the following steps: the method comprises the following steps: selecting an aluminum alloy section capable of being matched with welding, and carrying out primary water cleaning treatment on the surface of the processed aluminum alloy section to remove the adhesion of dust and impurities; step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution, and corroding at the temperature of 80-90 ℃ for 4-5min; the aluminum alloy section welded and manufactured by the method is firstly polished on the surface of the smooth aluminum alloy section by using polishing abrasive paper in the welding operation process, so that no old paint film is left on the surface, the welding connection quality is improved, the surface of a welding area has anti-skid textures and a forming effect, the fingers of a worker are attached to a rough surface in the welding process, the anti-skid textures are sufficient for giving hand feedback when the equipment moves, the welding process is close to a constant speed, and the stable welding distance and the welding effect are achieved.
Description
Technical Field
The invention relates to the technical field of aluminum alloy welding, in particular to a welding process of an aluminum alloy profile.
Background
When the painted section bar is welded, an old paint film needs to be removed, the surface cleaning effect is poor before the aluminum alloy is welded in the prior art, the residual old paint film exists, the welding quality is influenced, meanwhile, the surface of the aluminum alloy section bar is smooth, the stability of the trend of welding rods is not facilitated, meanwhile, the movement speed of the welding rods is inconsistent, and the deviation of the welding position is caused.
Disclosure of Invention
The invention aims to provide a welding process of an aluminum alloy section, which aims to solve the problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a welding process of an aluminum alloy profile comprises the following steps:
the method comprises the following steps: selecting an aluminum alloy section which can be matched with welding, and carrying out primary water cleaning treatment on the surface of the processed aluminum alloy section to remove the adhesion of dust and impurities;
step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution, and corroding at the temperature of 80-90 ℃ for 4-5min;
step three: after the corrosion is finished, putting the aluminum alloy section into a 10% nitric acid solution for treatment and washing;
step four: taking out the washed aluminum alloy section bar, drying the area needing to be welded, polishing the drying area, thoroughly removing the old paint film adhered to the surface of the aluminum alloy section bar, and roughening the surface of the welding area through polishing;
step five: welding seams of the multiple groups of polished aluminum alloy sections are butted, the aluminum alloy sections are clamped and fixed through a clamp, and welding rods connected through welding equipment are used to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag smoothly, and then cooling the welding position;
step seven: the surface of the polished aluminum alloy section is painted, and the surface of a welding area is rough, so that the adhesion of a paint surface is firmer;
wherein, the surface grinding operation in the fourth step comprises the following steps;
s41: fixing the aluminum alloy section on a polished desktop;
s42: roughly grinding and brushing off an old paint film on the surface of the aluminum alloy profile by using a steel wire brush, removing a large area of old paint film on the surface of the aluminum alloy profile, forming a rough grinding area, and then blowing air to clean the rough grinding area to remove impurities of the paint film on the surface;
s43: selecting 80-100 meshes of abrasive paper, fixing the abrasive paper on a grinding part, and secondarily grinding the rough grinding area by contacting the abrasive paper with the surface of the aluminum alloy section, wherein the grinding area is sprayed in the grinding process to remove impurities generated by grinding;
s44: detecting the surface of the aluminum alloy section bar after polishing by using a charge coupled device, and detecting whether an old paint film is remained on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in the S44, polishing is qualified, and polishing operation is completed;
s46: if an old paint film exists on the surface of the aluminum alloy section in S44, grinding is unqualified, 80-100 meshes of sand paper is selected for continuous grinding, and then the step in S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps;
s51: placing a plurality of groups of polished and cleaned aluminum alloy sections on a flat table top, butting the welding seams of the two groups of sections, and adjusting the angles of the welding seams;
s52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
s53: measuring the welding angles of the two groups of aluminum alloy sections fixed on the table board through an angle measuring instrument, and determining whether the welding requirements are met;
s54: if the measured data of the angle measuring instrument in the S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the surface of the metal section bar is contacted by fingers to form a certain support, and meanwhile, the skin of the fingers can be attached to the rough surface of the welding piece to carry out welding in a constant speed direction;
s55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
the welding slag polishing operation in the sixth step specifically comprises the following steps;
s61: polishing the welded area of the aluminum alloy section by using a grinding machine, and enabling the height of the raised welding slag to approach the surface of the aluminum alloy section;
s62: finely polishing the welding area polished by the grinder by using 800-1000-mesh abrasive paper, and forming a smooth surface on the welding area of the aluminum alloy section;
s63: measuring the finely ground aluminum alloy section by using a horizontal measuring instrument, and determining whether the surface of a ground area is smooth and flat;
s64: if the surfaces of the welding slag and the aluminum alloy section in the welding area are kept flat and consistent in S63, the requirement of welding slag polishing is met;
s65: and if the surfaces of the welding slag and the aluminum alloy section in the welding area are not kept smooth and consistent in S63, the welding slag grinding requirements are met, and the step S62 is repeated.
Preferably, the step one of cleaning the selected aluminum alloy section specifically further comprises cleaning a weld area of the aluminum alloy section.
Preferably, the alkaline solution in the second step is any one of sodium hydroxide, dimethylformamide and dichloromethane solution.
Preferably, in the fourth step, the welding area is polished, the polishing depth is determined by the thickness of the residual old paint film, and the exposed metallic luster is ensured, so that the surface has no residual old paint film.
Preferably, the roughness of the moving area of the welding rod in the five-step welding process is close to be consistent, the anti-skid texture is enough to give feedback to a hand when the equipment moves, the welding process is close to be uniform, and the welding distance between the welding rod and the aluminum alloy profile is 2-4mm.
Preferably, the surface of the aluminum alloy profile polished in the fifth step is provided with anti-skid textures.
Preferably, the welding position is cooled in the sixth step by air cooling, and slag in the welding area is removed and cooled.
Compared with the prior art, the invention has the beneficial effects that:
polishing the smooth surface of the aluminum alloy section by using polishing abrasive paper, specifically polishing the surface of a welding area, wherein the polishing area is larger than the welding area, the polishing depth is determined by the thickness of a residual old paint film, and the exposed metallic luster is ensured, so that the surface has no residual old paint film, and the quality of welding connection is improved; the surface of the welding area has anti-skid textures and a forming effect, the adhesion of the fingers of a worker and a rough surface in the welding process can enable the welding rod and the welding equipment to move relatively uniformly and stably in a continuous direction, the anti-skid textures can also give feedback to a hand when the equipment moves, the welding process is close to a constant speed, the welding distance between the welding rod and the aluminum alloy section is kept equal, and the welding distance is 2-4mm, so that a stable welding effect is achieved.
Drawings
FIG. 1 is a schematic flow chart of the welding process of the present invention;
FIG. 2 is a flow chart of the polishing process of the present invention;
FIG. 3 is a flow chart of a test welding process of the present invention;
FIG. 4 is a flow chart of the slag grinding process of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows:
the welding process of the aluminum alloy section comprises the following steps:
the method comprises the following steps: selecting an aluminum alloy section which can be matched with welding, and carrying out primary water cleaning treatment on the surface of the processed aluminum alloy section to remove the adhesion of dust and impurities;
step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% of alkaline solution which is sodium hydroxide, and corroding at the temperature of 80-90 ℃ for 4-5min;
step three: after the corrosion is finished, putting the aluminum alloy section into a 10% nitric acid solution for treatment and washing;
step four: taking out the washed aluminum alloy section bar, drying the area needing to be welded, polishing the drying area, thoroughly removing the old paint film adhered to the surface of the aluminum alloy section bar, and roughening the surface of the welding area through polishing;
step five: butt-jointing the welded seams of the multiple groups of polished aluminum alloy sections, clamping and fixing the aluminum alloy sections through a clamp, and using welding rods connected through welding equipment to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag smoothly, and then cooling the welding position;
step seven: the surface of the polished aluminum alloy section is painted, and the surface of a welding area is rough, so that the adhesion of a paint surface is firmer;
the surface grinding operation in the fourth step specifically comprises the following steps;
s41: fixing the aluminum alloy section on a polished desktop;
s42: roughly grinding and brushing an old paint film on the surface of the aluminum alloy profile by using a steel wire brush to remove a large area of old paint film on the surface of the aluminum alloy profile and form a rough grinding area, and then blowing air to clean the rough grinding area to remove impurities of the paint film on the surface;
s43: selecting 80-100 meshes of abrasive paper, fixing the abrasive paper on a grinding part, and secondarily grinding the rough grinding area by contacting the abrasive paper with the surface of the aluminum alloy section, wherein the grinding area is sprayed in the grinding process to remove impurities generated by grinding;
s44: detecting the surface of the aluminum alloy section bar after polishing by using a charge coupled device, and detecting whether an old paint film is remained on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, polishing to be qualified, and finishing polishing operation;
s46: if an old paint film exists on the surface of the aluminum alloy section in S44, grinding is unqualified, 80-100 meshes of sand paper is selected for continuous grinding, and then the step in S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps;
s51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
s52: clamping and fixing the adjacent welded aluminum alloy sections through a clamp;
s53: measuring the welding angles of the two groups of aluminum alloy sections fixed on the table top by an angle measuring instrument, and determining whether the welding requirements are met;
s54: if the measured data of the angle measuring instrument in the S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the surface of the metal section bar is contacted by fingers to form a certain support, and meanwhile, the skin of the fingers can be attached to the rough surface of the welding piece to carry out welding in a constant speed direction;
s55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
the welding slag polishing operation in the sixth step specifically comprises the following steps;
s61: polishing the welded area of the aluminum alloy section by using a grinding machine, and enabling the height of the raised welding slag to approach the surface of the aluminum alloy section;
s62: finely polishing the welding area polished by the grinder by using 800-1000-mesh abrasive paper, and forming a smooth surface on the welding area of the aluminum alloy section;
s63: measuring the finely ground aluminum alloy section by using a horizontal measuring instrument, and determining whether the surface of a ground area is smooth and flat;
s64: if the surfaces of the welding slag and the aluminum alloy section in the welding area are kept smooth and consistent in S63, the requirement of welding slag polishing is met;
s65: and if the surfaces of the welding slag and the aluminum alloy section in the welding area are not kept smooth and consistent in S63, the welding slag grinding requirements are met, and the step S62 is repeated.
Example two:
the welding process of the aluminum alloy section comprises the following steps:
the method comprises the following steps: selecting an aluminum alloy section which can be matched with welding, and carrying out primary water cleaning treatment on the surface of the processed aluminum alloy section to remove the adhesion of dust and impurities;
step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% of dimethyl formamide, and corroding at the temperature of 80-90 ℃ for 4-5min;
step three: after the corrosion is finished, putting the aluminum alloy section into a 10% nitric acid solution for treatment and washing;
step four: taking out the washed aluminum alloy section bar, drying the area needing to be welded, polishing the dried area, thoroughly removing an old paint film adhered to the surface of the aluminum alloy section bar, and polishing to roughen the surface of the welded area;
step five: welding seams of the multiple groups of polished aluminum alloy sections are butted, the aluminum alloy sections are clamped and fixed through a clamp, and welding rods connected through welding equipment are used to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag smoothly, and then cooling the welding position;
step seven: the surface of the polished aluminum alloy section is painted, and the surface of a welding area is rough, so that the adhesion of a paint surface is firmer;
the surface grinding operation in the fourth step specifically comprises the following steps;
s41: fixing the aluminum alloy section on a polished desktop;
s42: roughly grinding and brushing an old paint film on the surface of the aluminum alloy profile by using a steel wire brush to remove a large area of old paint film on the surface of the aluminum alloy profile and form a rough grinding area, and then blowing air to clean the rough grinding area to remove impurities of the paint film on the surface;
s43: selecting 80-100 meshes of abrasive paper, fixing the abrasive paper on a grinding part, and secondarily grinding the rough grinding area by contacting the abrasive paper with the surface of the aluminum alloy section, wherein the grinding area is sprayed in the grinding process to remove impurities generated by grinding;
s44: detecting the surface of the aluminum alloy section bar after polishing by using a charge coupled device, and detecting whether an old paint film is remained on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in S44, polishing to be qualified, and finishing polishing operation;
s46: if an old paint film exists on the surface of the aluminum alloy section in the S44, unqualified polishing is carried out, 80-100-mesh sand paper is selected for continuous polishing, and then the step in the S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps;
s51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
s52: clamping and fixing the adjacent welded aluminum alloy profiles through a clamp;
s53: measuring the welding angles of the two groups of aluminum alloy sections fixed on the table board through an angle measuring instrument, and determining whether the welding requirements are met;
s54: if the measured data of the angle measuring instrument in the S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and contacts the surface of the metal section bar by using fingers to form a certain support, and meanwhile, the skin of the fingers can be attached to the rough surface of the weldment to perform welding in a constant speed direction;
s55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
the welding slag polishing operation in the sixth step specifically comprises the following steps;
s61: polishing the welded area of the aluminum alloy section by using a grinding machine, and enabling the height of the raised welding slag to approach the surface of the aluminum alloy section;
s62: finely polishing the welding area polished by the grinder by using 800-1000-mesh abrasive paper, and forming a smooth surface on the welding area of the aluminum alloy section;
s63: measuring the finely ground aluminum alloy section by using a horizontal measuring instrument, and determining whether the surface of a ground area is smooth and flat;
s64: if the surfaces of the welding slag and the aluminum alloy section in the welding area are kept flat and consistent in S63, the requirement of welding slag polishing is met;
s65: and if the surfaces of the welding slag and the aluminum alloy section in the welding area are not kept smooth and consistent in S63, the welding slag grinding requirements are met, and the step S62 is repeated.
Example three:
the welding process of the aluminum alloy section comprises the following steps:
the method comprises the following steps: selecting an aluminum alloy section which can be matched with welding, and carrying out primary water cleaning treatment on the surface of the processed aluminum alloy section to remove the adhesion of dust and impurities;
step two: placing the aluminum alloy section subjected to preliminary water cleaning treatment in a 10% -15% dichloromethane solution, and corroding at the temperature of 80-90 ℃ for 4-5min;
step three: after the corrosion is finished, putting the aluminum alloy section into a 10% nitric acid solution for treatment and washing;
step four: taking out the washed aluminum alloy section bar, drying the area needing to be welded, polishing the drying area, thoroughly removing the old paint film adhered to the surface of the aluminum alloy section bar, and roughening the surface of the welding area through polishing;
step five: welding seams of the multiple groups of polished aluminum alloy sections are butted, the aluminum alloy sections are clamped and fixed through a clamp, and welding rods connected through welding equipment are used to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag smoothly, and then cooling the welding position;
step seven: the surface of the polished aluminum alloy section is painted, and the surface of a welding area is rough, so that the adhesion of a paint surface is firmer;
the surface grinding operation in the fourth step specifically comprises the following steps;
s41: fixing the aluminum alloy section on a polished desktop;
s42: roughly grinding and brushing off an old paint film on the surface of the aluminum alloy profile by using a steel wire brush, removing a large area of old paint film on the surface of the aluminum alloy profile, forming a rough grinding area, and then blowing air to clean the rough grinding area to remove impurities of the paint film on the surface;
s43: selecting 80-100 meshes of abrasive paper, fixing the abrasive paper on a grinding part, and secondarily grinding the rough grinding area by contacting the abrasive paper with the surface of the aluminum alloy section, wherein the grinding area is sprayed in the grinding process to remove impurities generated by grinding;
s44: detecting the surface of the aluminum alloy section bar after polishing by using a charge coupled device, and detecting whether an old paint film is remained on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in the S44, polishing is qualified, and polishing operation is completed;
s46: if an old paint film exists on the surface of the aluminum alloy section in the S44, unqualified polishing is carried out, 80-100-mesh sand paper is selected for continuous polishing, and then the step in the S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps;
s51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
s52: clamping and fixing the adjacent welded aluminum alloy profiles through a clamp;
s53: measuring the welding angles of the two groups of aluminum alloy sections fixed on the table board through an angle measuring instrument, and determining whether the welding requirements are met;
s54: if the measured data of the angle measuring instrument in the S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and the surface of the metal section bar is contacted by fingers to form a certain support, and meanwhile, the skin of the fingers can be attached to the rough surface of the welding piece to carry out welding in a constant speed direction;
s55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
the welding slag polishing operation in the sixth step specifically comprises the following steps;
s61: polishing the welded area of the aluminum alloy section by using a grinding machine, and enabling the height of the raised welding slag to approach the surface of the aluminum alloy section;
s62: finely polishing the polished welding area of the grinding machine by using 800-1000 meshes of abrasive paper, and forming a smooth surface on the welding area of the aluminum alloy section;
s63: measuring the finely ground aluminum alloy section by using a horizontal measuring instrument, and determining whether the surface of a ground area is smooth and flat;
s64: if the surfaces of the welding slag and the aluminum alloy section in the welding area are kept flat and consistent in S63, the requirement of welding slag polishing is met;
s65: and if the surfaces of the welding slag and the aluminum alloy section in the welding area are not kept smooth and consistent in S63, the welding slag grinding requirements are met, and the step S62 is repeated.
The aluminum alloy section welded and manufactured by the method is firstly polished on the surface of the smooth aluminum alloy section by using polishing abrasive paper in the welding operation process, specifically, the surface of a welding area is polished, the polished area is larger than the welding area, the polishing depth is determined by the thickness of a residual old paint film, the metal luster of the residual old paint film is ensured to be exposed, no residual old paint film is left on the surface, the quality of welding connection is improved, the surface of the welding area has anti-skid textures and a forming effect, the welding process is close to a constant speed, the welding distance between the welding rod and the aluminum alloy section is kept equal, the welding distance is between 2 mm and 4mm, and the anti-skid textures are enough to give hand feedback when the equipment moves.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The welding process of the aluminum alloy section is characterized by comprising the following steps of:
the method comprises the following steps: selecting an aluminum alloy section capable of being matched with welding, and carrying out primary water cleaning treatment on the surface of the processed aluminum alloy section to remove the adhesion of dust and impurities;
step two: placing the aluminum alloy section subjected to primary water cleaning treatment in 10% -15% alkaline solution, and corroding at the temperature of 80-90 ℃ for 4-5min;
step three: after the corrosion is finished, putting the aluminum alloy section into a 10% nitric acid solution for treatment and washing;
step four: taking out the washed aluminum alloy section bar, drying the area needing to be welded, polishing the dried area, thoroughly removing an old paint film adhered to the surface of the aluminum alloy section bar, and polishing to roughen the surface of the welded area;
step five: welding seams of the multiple groups of polished aluminum alloy sections are butted, the aluminum alloy sections are clamped and fixed through a clamp, and welding rods connected through welding equipment are used to ensure stable welding;
step six: polishing the welding slag protruding from the welding area, polishing the welding slag smoothly, and then cooling the welding position;
step seven: the surface of the polished aluminum alloy section is subjected to paint spraying treatment, and the surface of a welding area is rough, so that the paint surface is more firmly adhered;
wherein, the surface grinding operation in the fourth step comprises the following steps;
s41: fixing the aluminum alloy section on a polished desktop;
s42: roughly grinding and brushing off an old paint film on the surface of the aluminum alloy profile by using a steel wire brush, removing a large area of old paint film on the surface of the aluminum alloy profile, forming a rough grinding area, and then blowing air to clean the rough grinding area to remove impurities of the paint film on the surface;
s43: selecting 80-100 meshes of abrasive paper, fixing the abrasive paper on a grinding part, and secondarily grinding the coarse grinding area by contacting the abrasive paper with the surface of the aluminum alloy section, wherein the grinding area is sprayed in the grinding process to remove impurities generated by grinding;
s44: detecting the surface of the aluminum alloy section bar after polishing by using a charge coupled device, and detecting whether an old paint film is remained on the surface;
s45: if no old paint film exists on the surface of the aluminum alloy section in the S44, polishing is qualified, and polishing operation is completed;
s46: if an old paint film exists on the surface of the aluminum alloy section in the S44, unqualified polishing is carried out, 80-100-mesh sand paper is selected for continuous polishing, and then the step in the S43 is repeated;
the surface welding operation in the fifth step specifically comprises the following steps;
s51: placing a plurality of groups of polished aluminum alloy sections on a flat table top, butting welding seams of the two groups of sections, and adjusting the angles of the welding seams;
s52: clamping and fixing the adjacent welded aluminum alloy profiles through a clamp;
s53: measuring the welding angles of the two groups of aluminum alloy sections fixed on the table top by an angle measuring instrument, and determining whether the welding requirements are met;
s54: if the measured data of the angle measuring instrument in the S53 is consistent with the required welding angle, the requirement of the welding angle is met, at the moment, a worker holds the welding equipment to adjust the welding angle, and contacts the surface of the metal section bar by using fingers to form a certain support, and meanwhile, the skin of the fingers can be attached to the rough surface of the weldment to perform welding in a constant speed direction;
s55: if the measured data of the angle measuring instrument in the step S53 is inconsistent with the required welding angle, the requirement of the welding angle is not met, the clamp is loosened, the position of the aluminum alloy section is adjusted, and the step S51 is repeated;
the welding slag polishing operation in the sixth step specifically comprises the following steps;
s61: polishing the welded area of the aluminum alloy section by using a grinding machine, and enabling the height of the raised welding slag to approach the surface of the aluminum alloy section;
s62: finely polishing the welding area polished by the grinder by using 800-1000-mesh abrasive paper, and forming a smooth surface on the welding area of the aluminum alloy section;
s63: measuring the finely ground aluminum alloy section by using a horizontal measuring instrument, and determining whether the surface of a ground area is smooth and flat;
s64: if the surfaces of the welding slag and the aluminum alloy section in the welding area are kept flat and consistent in S63, the requirement of welding slag polishing is met;
s65: and if the surfaces of the welding slag and the aluminum alloy section in the welding area are not kept smooth and consistent in S63, the welding slag grinding requirements are met, and the step S62 is repeated.
2. The welding process of an aluminum alloy profile according to claim 1, characterized in that: and in the step one, the selected aluminum alloy section is cleaned, and the welding seam area of the aluminum alloy section can be washed by hot water.
3. The welding process of an aluminum alloy profile according to claim 1, characterized in that: and the alkaline solution in the second step is any one of sodium hydroxide, dimethylformamide and dichloromethane solution.
4. The welding process of an aluminum alloy profile according to claim 1, characterized in that: and in the fourth step, the welding area is polished, the polishing depth is determined according to the thickness of the residual old paint film, and the exposed metal luster is ensured, so that no old paint film is left on the surface.
5. The welding process of an aluminum alloy profile according to claim 1, characterized in that: and fifthly, the roughness of the trend area of the welding rod is close to be consistent in the welding process, so that the welding process is close to be uniform, and the welding distance between the welding rod and the aluminum alloy section is 2-4mm.
6. The welding process of an aluminum alloy profile according to claim 1, characterized in that: and fifthly, forming anti-skid textures on the surface of the polished aluminum alloy section.
7. The welding process of an aluminum alloy profile according to claim 1, characterized in that: and in the sixth step, the welding position can be cooled by air cooling, and slag in the welding area is removed and cooled.
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